Seed guide path planning and parameter optimization for air-suction carrot seed-metering device  

作　　者：Fangyan Wang Wenxin Zhang Jingtao Jiang 

机构地区：[1]College of Mechanical and Electrical Engineering,Qingdao Agricultural University,Qingdao 266109,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第5期104-112,共9页国际农业与生物工程学报（英文）

基　　金：sponsored by the Natural Science Foundation of Shandong Province(Grant No.ZR202111230084);Qingdao Science and Technology Demonstration and Guidance Project(Grant No.2237xdny17nsh);Shandong Science and Technology SMEs Innovation Capacity Improvement Project(Grant No.2021TSGC 1428);Key R&D Plan of Shandong Province(Grant No.2019GNC106056);Key R&D Plan of Shandong Province(Grant No.2017NC212006)and Qingdao Minsheng Science and Technology Plan(Grant No.173352nsh).

摘　　要：To meet the requirement of“zero speed”for precision sowing,the instantaneous speed of seed falling into the seed bed should be equal to the opposite direction of the forward speed of the machine.Through analyzing the principle of seed guiding process,the main influencing factors affecting the contour curve of the seed tube were determined to plan the seed guiding path and realize zero speed seed delivery.With the help of EDEM simulation software,taking the inclination angle of seed tube end,operating speed of the metering disc,and machine’s forward speed as the experimental factors,a single-factor simulation test was conducted with the pass rate,replay rate,and missing seeding rate as experimental indexes.The results of the simulation test showed that the range of inclination angle of the seed tube end was 23°-40°,the range of machine forward speed was 5-9 km/h,and the range of operating speed of the metering disc was 15-40 r/min.The quadratic orthogonal rotation combination test method was carried out using the bench test,and a mathematical regression model was established between experimental factors and experimental indexes to determine the priority order of factors,and the best combination of factors.The test results showed that the pass rate was 93.25%,the replay rate was 2.97%and the missing seeding rate was 3.78%under the condition with the inclination angle of seed tube end of 32.28°,the forward speed of the machine of 6.89 km/h and the operating speed of the metering disc of 28.67 r/min,which can meet the requirements of relevant national standards.

关 键 词：CARROT seed-metering device seed guiding process mechanism analysis EDEM software bench test 

分 类 号：S223.2[农业科学—农业机械化工程]